Band alignment and electrocatalytic activity at the p-n La0.88Sr0.12FeO3/SrTiO3 (001) heterojunction
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Physical and Computational Sciences Directorate
- Nanyang Technological Univ. (Singapore)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab.
Ferrites perovskites have exhibited promising p-type conductivity and oxygen evolution reaction (OER) activity. In this work, we investigate heteroepitaxial p-n junctions formed with La0.88Sr0.12FeO3 and n-SrTiO3(001). Sr substitution for La in LaFeO3 is shown to be effective for introducing p-type conductivity, lowering the optical bandgap, and enhancing electrocatalytic OER. A staggered, type-II band alignment with a large built-in potential within the LSFO forms due to the polar interface. This electronic structure facilitates charge transfer across the p-n junction and accounts for the strongly thickness-dependent extent of OER we observe.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- AC05-76RL01830; MOE2013-T2-1-052; MOE2014-T2-1-099
- OSTI ID:
- 1495391
- Alternate ID(s):
- OSTI ID: 1457085
- Report Number(s):
- PNNL-SA-135023
- Journal Information:
- Applied Physics Letters, Vol. 112, Issue 26; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 18 works
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Erratum: “Band alignment and electrocatalytic activity at the p-n La 0.88 Sr 0.12 FeO 3 /SrTiO 3 (001) heterojunction” [Appl. Phys. Lett. 112 , 261601 (2018)]
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Erratum: “Band alignment and electrocatalytic activity at the p-n La 0.88 Sr 0.12 FeO 3 /SrTiO 3 (001) heterojunction” [Appl. Phys. Lett. 112 , 261601 (2018)]
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